Aunty, do you really believe that if we had not invaded Iraq, Iran would have? Most folks have memories that are longer than a generation and the Iran/Iraq War from the 1980's was particularly bloody. It is clear that your scenario is quite likely if we were to pull up stakes now.
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"You're not a g*dda*n looney Martini, you're a fisherman"

R.P. McMurphy - One Flew Over The Cuckoo's Nest